Peronospora rubi Rabenhorst, 1886

on Rubus

gall

underside of the leaves with a greyish fungal down of erect conidiophores that apically several times are dichotomously branching, each branch ending upon a conidium. Embedded in the host tissue lie brown, thick-walled, smooth oospores. Upper side of the leaves with yellow, angular leaf spots.

host plants

Rosaceae, monophagous

Rubus caesius, fruticosus, gracilis, idaeus, laciniatus, plicatus.

references

Brandenburger (1985a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kruse (2019a), Kruse, Thiel, Beenken ao (2018d), Müller & Kokeš (2008a).

mod 1.ix.2019